Non-halogenous insulated wire and a wiring harness

Abstract

A non-halogenous insulated wire [possessing sufficient flame retardancy and excellent heat resistance, wear resistance and flexibility, ]and a wiring harness including the wire. The wire includes a conductor, an inside coat of one or more layers and an outermost coat, wherein the outermost coat is in the range of 10 to 100 μm in thickness and is made from a resin composition including an olefin resin with a melting point of 180 ° C. or more and / or an olefin resin having a —Si(XI) (X 2) (X 3) group, by 20 wt% or more, and at least one of the layers of the inside coat is made from a resin composition including (A) an olefin resin with a melting point of 180 ° C. or more by 50-5 to part weight, (B) an olefin resin by 50 to 95 part weight, and (C) a metallic hydrate by 30 to 250 part weight.

Description

TECHNICAL FIELD[0001]The present invention relates to a non-halogenous insulated wire and a wiring harness, and more specifically relates to a non-halogenous insulated wire having a multilayered structure and a wiring harness including the same.BACKGROUND ART[0002]Conventionally, insulated wires in which conductors are covered with covering materials made from a resin composition are frequently used in carrying out wiring of parts for a car and electric / electronic equipment. In this type of insulated wires, especially in the insulated wire to be used in a section where heat resistance is required, used as the covering material is a vinyl chloride resin composition of which heat resistance is improved by adjusting types, amounts or polymerization degrees of a thermal stabilizer and a plasticizer to be added thereto, or by forming cross-links therein.[0003]However, there is a problem that this type of vinyl chloride resin composition includes halogen elements, so that it emits harmful...

AI Technical Summary

Benefits of technology

The present invention provides a non-halogenous insulated wire that has sufficient flame retardancy and excellent heat resistance, wear resistance, and flexibility. The wire includes a conductor, an inside coat, and an outermost coat. The outermost coat is made from a resin composition including an olefin resin with a melting point of 180°C or more and / or an olefin resin having a —Si(X1)(X2)(X3) group (where X1, X2, and X3 are an alkyl group or an alkoxy group while at least one of X1, X2, and X3 is the alkoxy group). The inside coat is made from a resin composition including (A) an olefin resin with a melting point of 180°C or more, (B) an olefin resin by (50 to 95 part weight, and (C) a metallic hydrate by (30 to 250 part weight. The outermost coat and / or the inside coat may be cross-linked. The non-halogenous insulated wire and wiring harness including it provide safer and more reliable wiring for various applications.

Problems solved by technology

However, there is a problem that this type of vinyl chloride resin composition includes halogen elements, so that it emits harmful halogenous gas into the atmosphere in case of car fire or at the time of combustion for disposing of electric / electronic equipment by incineration, causing environmental pollution.

However, the olefin resin is essentially combustible, and the non-halogenous flame retardant is inferior to a halogenous flame retardant in effect of flame retardancy.

For these reasons, the non-halogenous flame-retardant resin composition requires a large amount of metallic hydrate to be added thereto in order to secure sufficient flame retardancy, thus bringing a disadvantage that mechanical properties such as wear resistance, tensile elongation and tensile strength remarkably degrade.